CEF is based directly on the FIB and synched constantly on what is in the RIB (Routing Table). This contains next-hop encap type as well within the CEF table.
Flow Based (Fast Switching) is based on a FLOW (Source IP , Destination IP, Source Port, Dest Port, etc) and the first packet is process switched and follow on packets use the fast switching cache that has been built. The down side to this method is that each unique flow will get a cache entry, which can result in scaling issues if there are tons of flows (CEF shines here). Also a portion of the cache is expired every so often and packets within the flows that have been expired must be process switched again prior to them getting a cache entry re-populated.
There is more information on this on CCO... without knowing what specifics you would like to know it's hard give you all information here.
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.